Multifunction key telephone set



FIG. 1 is a perspective view of a multifunction key telephone set, with the receiver removed from the base and inverted, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is an elevational view from the left side thereof;

FIG. 5 is an elevational view from the right side thereof;

FIG. 6 is a bottom view thereof; and

FIG. 7 is a top plan view thereof. 

The ornamental design for a multifunction key telephone set, as shown and described. 